Understanding why older people participate in clinical trials: the experience of the Scottish PROSPER participants

over the next 20 years it is anticipated that there will be a significant increase in those aged 75 and over, and a consequent increase in cardiovascular disease, cancer and chronic illness. As this shift takes effect, there will be an increased need for treatment strategies that are of known benefit to this age group and a consequent rise in demand for clinical trials that are conducted specifically with the older population. Because factors that motivate older individuals to participate in clinical trials may differ from those that influence younger adults, it is important to evaluate the strategies used to encourage recruitment and retention and to determine how appropriate these are.